| 2014年长江流域三次暴雨过程卫星云图释用研究 |
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| 引用本文： | 张晶晶,梅婷,辛学飞.2014年长江流域三次暴雨过程卫星云图释用研究[J].高原山地气象研究,2015,35(4):26-30. |
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| 作者姓名： | 张晶晶 梅婷 辛学飞 |
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| 作者单位： | 江西省九江市气象台, 九江 332000 |
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| 基金项目： | 江西省气象局预报员专项"两次台风暴雨过程中尺度特征对比分析中国气象局预报员专项项目"2014年第10号台风"麦德姆"局地特大暴雨成因分析"(CMAYBY2015-039) |
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| 摘 要： | 本文利用实况探空资料和风云2C、2D卫星探测资料，对2014年7月西太平洋副高与西风带低槽共同作用下长江流域出现的三次暴雨过程进行分析，将三次过程卫星云图以及各种物理要素场配置进行对比，得到以下结论。云系表现为典型的梅雨锋云系特征，云系位于高空槽前580线与副高外围588线之间。降水云带由对流云团、稳定性降水云团及混合性降水云带三部分组成。梅雨锋中的MCC云团十分活跃。随着云团最强对流的逐渐减弱，云团面积迅速膨胀，并持续数小时后很快减小，强降水主要发生在云团发展和成熟期中。强降水还与对流有关，降水强度总体上跟TBB强度呈反相关，TBB越低降水越强。梅雨锋云系的分布与各层的垂直速度场、涡度场、散度场有很好的对应关系，与中高层的涡度平流场也有较好的对应关系，云带总体位置与上升运动区、低层辐合和高层辐散区、正涡度平流区位置近乎重叠。比湿通量、比湿通量散度和假相当位温等温湿参量的分布特征能很好锋面云带的移动、发展和分布特征。
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| 关 键 词： | 副热带高压 西风低槽 云图 暴雨 物理量 |
| 收稿时间： | 2015-11-30 |
Analysis and Explanation of Satellite Cloud Images for Three Rainstorm Processes in 2014 |
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| Institution: | Jiujiang Meteorological Observatory, Jiujiang 332000, China |
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| Abstract: | This article collected and used the data from radiosonde and FY－2C2D Satellite，and thoroughly analyzed the reason for Three rainstorm in Changjiang area，which were jointly caused by subtropical high and physical fields in July 2014．Comparing the satellite cloud images and physical fields from the three rainstorm process，conclusions were fully presented as follows．The entire cloud band was the typical Meiyu Frontal Cloud Systems ，The entire cloud band located between line 580 and line 588，which was composed of convective clouds，a stable precipitation cloud band and mixed precipitation cloud band ．The TBB(Black－Body Temperature) depicts that alternately developed of the MCC．As the strongest convection gradually decrease，the cold TBB area expand quickly in hours before dissipation．The heavy rainfall occurs in MCC＇s developing and maturing stages．And the minimum TBB fluctuation matches well to the precipitation trend(the lower TBB the heavier rainfall) ．The distribution of the cloud system had a very good correspondence with the vertical velocity field，vorticity field，divergence field，and high－ level vorticity advection field．The distribution characteristics of temperature and humidity parameters，such as humidity flux，humidity flux divergence，and pseudo－ equivalent potential temperature，gave a clear explanation of the movement，development，and distribution characteristics of the frontal cloud hands． |
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